Asked about the plan of former Davao City Vice Mayor Paolo Duterte, the president also said he hasn't talked to his son "for the longest time."

"Frankly, I haven't talked to my son for the longest time...He has his own family, maybe he finds few opportunities for me to talk to him. Alam mo naman ako, I commute Manila-Davao frequently and only because my residence is here," he said.

Duterte said he is waiting for his son to talk to him.

"I expect him as a son to come to me and say, "Pa gusto kong tatakbo." Kasi alam mo eh, anak ko eh," he said.

In next year's elections, Paolo is expected to run for congressman in Davao City's 1st district.

Paolo resigned from as Davao City vice mayor in December following a public spat with his daughter and after being tagged in the P6.4-billion worth of shabu shipment that slipped past the Bureau of Customs.